This paper describes an approach of implementing

software based GPS receiver acquisition and tracking for

L1 C/A signal on ADSP SHARC. The main objective of this

paper is bring out fast GPS signal tracking method using

which more number of channels(satellites) can be tracked on

a fixed and limited resources DSP platform. Further, GPS

acquisition, Carrier Pull-in and C/A Code prediction modules

are discussed.All the processing for the algorithms are done

using sign bit of the ADC.A time domain based approach

without early and late codes is used for Tracking GPS signal.